Excavator.



WITNESS LE ROY P. CLUTTER.

EXCAVATOR. APPLICATION FILED 0Ec.13.19\6l Patented Dec. 31, 1918.

marx INVENTOR srnrns rar EXCAVATR.

Speeication of Letters Patent.

Patented libeo. 31,1912.

Application tiled December 13, 1916. Serial No. 136,@23.

To allwhom' t may concern:

Be it known that l, lm Ror P. CLU'rrnR,

a citizen of the United States of America,

residing at Washington, county of Washington, and State of Pennsylvania, have invented certain new and useful Improvef ments in Excavators, of which the following is a specification.

This invention relates to excavators andv has for its object to provide means, in 'a manner as hereinafter set forth, to mcrease the length of the travel of the scoop or"in other words to enable the scoop to vmove from thel'inner endv toa point beyond the outer end of the boom whereby the ditching stroke of the scoop will be materially increased with respect to the length of the stroke now imparted to scoops in excavating or ditching machines.

With the foregoing and other objects in.

view the invention consists of the novel construction, combination and arrangement of parts, as hereinafter more specically described and illustrated in the accompanying drawings, wherein is shown an embodiment of the invention, but it is to be understood that changes, variations and modifications canv be resorted to which come within the scope of the claims hereunto appended.

ln the drawings wherein like reference characters denote corresponding parts throughout the several views Figure 1 is a side elevation showing thenected, as at 6, to the lower end of the mast,

1. The boom 5 carries a bracket 7, provided with a pulley 8 over which travels the pulling member d. At the outer end of the boom 5 a supporting bracket 9 is arranged for a pulley 10, over which travels a pulling' member 11; the latter also travels against the pulley 3.

The boom 5 consistso a body portion 12 which isoblong in vertical section and has secured to each side a channel shape member 13, the latter being of the same length as the length of the body portion 12.

vEach of the members 13 provides a track 1d ,for the wheels 1 5 of a trolley 16, from whch the scoop 17 is suspended.

rl`he trolley 16 consists of a body portion which is U-shape in cross section so as to extend at each side of a 'boom 5. Each side of the body. portion ofthe trolley supports a pair of inwardly extending shafts 18 and which carry the rollersor wheels 15. rl`he body portion of the trolley 16 extends below the boom 5.

At each side of the trolley 16, nearv the forward end thereof, is a suspension arm consisting of an upper portion19, an intermediate portion 20 and a lower portion 21. The intermediate portion -20 is disposed at right angles with respect to the portions 19 and 21. The upper portion 19 extends in a 'plane parallel to the plane of the lower portion 21. The upper. portion 19 has an enlarged upper end 22 which is maintained in vertical engagement-with the trolley 16 by a holding member 23. The lower porv vtion 21 is pivotally connectedv as at 23a, to

an upwardly extending lug 211 carried by the side of the scoop 17.

I Projecting from the rear oi the scoop 17 is a pair of brackets 25, having a rod 26 fixedly secured therein and loosely mounted on said rod 26 is a pair of hanger arms 27.

v which are connected together by a tie-bar 28.'

The upper end of each of thearms 27 is enlarged as at 29. and is held in frictional contact, by a holding member 30, with one side of the trolley 16 near the rear end thereof. A

rllhel pulling1 member 11 extends between the upper portions 19 of the Jfront hangerl arms and is connected as at 31, to thev tiebar 28.

The enlarged upper ends of the front and rear suspension or hanger arms trictionally engage with the trolley to such an extent that under normal conditions the upper ends of the arms will not shift while the trolley 16 'is moved by the pulling rope 11,l but when the trolley moves to the limit of its movement upon the 'boom 5, and it kabuts against the stop 32, a continual pull of the member 11 will break the irictional clamp and cause the scoop to project to the position shown in Fig. 2.

@wing to the manner in which the scoop roo is connected with the trolley, the scoop can be projected forwardly of the outer end of the boom 5, after the trolley arrives at the limit of its outward travel.

The reference character 33 denotes a latch, of lmown construction, for the dumping bottom 34 of the scoop.

The back of the scoop 17, above the brackets 25, is provided with a transverse bar 35, which constitutes a stop for the arms 27, when the scoop is pulled forwardly by the member ll and by such an arrangement the elements associated with the scoop are maintained in rigid relationship therewith when the scoop is moved forwardly.

The latch has a releasing member 36.

What I claim is l. In excavators, a boom, a scoop, a trolley traveling on the boom, front and rear hangers pivotally connected to and depending from the trolley, means for pivotally connecting the lower ends of the front hangers to the forward portion of the scoop be- -low the top thereof, and means for pivotally connecting the rear hangers to the back of the scoop below the top thereof, and a forwardly extending pulling member connected to the rear hangers intermediate the pivoted ends thereof.

2. In excavators a boom, a scoop, a trolley traveling on the boom, front and rear hangers pivotally connected to and depending from the trolley, means for pivotally connecting the lower end of the front hangers to the forward portion of the scoop below the top thereof, and means for pivotally connecting the rear hangers to the back of.

the scoop below the top thereof, and a stop projecting rearwardly from the back of the scoop to limit the forward swinging movement of the rear hangers.

3. In excavators a boom, a scoop, a trolley traveling on the boom, front and rear hangers pivotally connected to and depending from the trolley, means for pivotally connecting the lower end of the front hangers to the forward portion of the scoop below the top thereof, and means for pivotally connecting the rear hangers to the back of the scoop below the top thereof, a stop projecting rearwardly from the back of the scoop to limit the forward swinging movement of the rear hangers, and a -forwardly extending pulling member connected to the rear hangers intermediate the pivoted ends thereof.

4. In excavators a boom, a scoop, a trolley traveling on the boom, angle shaped front hangers having their upper ends pivotally connected to the trolley, means for pivotally connecting the lower ends of said hangers to the forward portion of the scoop below the top, rear hangers having their upper ends pivotally connected to the trolley, and means for pivotally connecting the messes lower ends of the rear hangers to the back of the scoop below the top thereof.

5. In excavators a boom, a scoop, a trolley traveling on the boom, angle shaped front hangers having their upper ends pivotally connected to the trolley, means for pivotally connecting the lower ends of said hangers to the forward portion of the scoop below the top, rear hangers having their upper ends pivotally connected to the trolley, and means for pivotally connecting the lower ends of the rear hangers to the back of the scoop below the top thereof, the lower ends of the rear hangers being disposed inwardly with respect to the lower ends of the front hangers.

6. In excavators a boom, a scoop, a trolley traveling on the boom, angle shaped front hangers having their upper ends pivotally connected to the trolley, means for pivotally connecting the lower ends of said hangers to the forward portion of the scoop below the top, rear hangers having their upper ends pivotally connected to the trolley, and means for pivotally connecting the lower ends of the rear hangers to the back of the scoop below the top thereof, and a forwardly extending pulling memberv connected with the rear hangers intermediate the pivoted ends thereof.

7. In excavators a boom, atrolley comprising a U-shaped body portion overlapping said boom and further comprising inwardly extending shafts carried by the sides of said body portion and provided/ vwith wheels traveling upon each side of the boom, front and rear hangers formed of rigid material, means for pivotally connecting the upper ends of said hangers and the sides of said body portion at points above the axis of said wheels, means for ivotally connecting the lower ends of the ront hangers to the forward portion of the scoop below the top thereof, and means for pivotally connecting the lower ends of the rear hangers to the back of the scoop below the top thereof.

8. In excavators a boom, atrolley comprising a U-shaped body portion overlapping said boom and further comprising inwardly extending shafts carried by the sides of said body portion and provided with wheels traveling upon each side of the boom, front and rear hangers formed of rigid material, means for pivotally connecting the upper end of said hangers and the sides of said body portion at points above the axis of said wheels,

means for pivotally connecting the lower 9. In excavators a boom, a trolley traveling thereon, a scoop, a means connecting the scoop and trolley-to allow the scoop to be projected beyond the outer ends of the boom after the trolley4 hasreached its limit of outward travel. Y

10. In excavators a boom, a scoop, a trolley traveling on the boom, front and rear hangers of rigidfmaterial, means for pivotally connecting the upper ends of the front hangers to the forward portion of the trolley, means for ivotally connecting the lower ends of the ont hangers to the forward portion of the scoop, means for pivotally connecting the rear hangers to the trolley at the rear ofthe latter, and means for pivotally connecting the y rear hangers to the back of the scoop below the top thereof.

11. In excavators a boom, a scoop, a'trolley traveling on the boom, front and rear hangers of rigid material, means for pivotally connecting the upper ends of the front hangers to the forward portionof the trolley, means for pivotally connecting the lower ends of the front hangers to the forward portion of the scoop, means for 'pivotally connecting the rear hangers to the trolley at the rear of the latter, and means for pivotally connecting the rear hangers to the back of the scoop below the top thereof, and

a forwardly extending pulling member connected with the rear hangers intermediate the pivoted ends of said rear hangers.

l2. In excavators a boom, a scoop, a trolley travelinfg on the boom, front and rear hangers o rigid material, means for pivotally connecting the upper ends of the front hangers to the forward portion of the trolley, means for ivotally connecting the lower ends of the ront hangers to the forwardnportion of the scoop, means for pivotends of said rear arms to the ally connecting the rear hangers to the trolley at the rear of the latter, and means for lvotally connectin the rear hangers to the Back of the scoop be ow the top thereof, and

a forwardly extending pulling member connected with the rear hangers intermediate -ing thereon, a pair of front anda pair of rear suspension arms having their upper ends ivotally connected with mal rictional clamping enga ement with said trolley, a scoop, means or pivotally connecting the lower ends of said front arms to the forward portion of the scoop, and means for pivotally connectin the lower ack of the scoop below the top thereof. A

14. In excavators, a boom, a trolley traveling thereon, a pair of front and a pair of rear suspension arms havin their upper ends ivotally connected wit and in normal rictional clamping enga ement with said trolley, a scoop, means or pivotally connecting the lower ends of said front arms to the forward portion of the scoop, and means for pivotally connecting the lower end of said rear larms to the vback of the scoop, below the top thereof, and a pulling member connected with said rear arms.

In testimony whereof'I allix my signature in the presence of twogwitnesses.

LE ROY r. oLU'r'rER.

Witnesses:

LUELLA H. SIMON, x H. Snomvlrz.

and in nor- 

